This morning at 6:12 am looking south from Georgetown, Texas, there was a brief very bright stationary object what appeared to be a star that once I saw it within the next few seconds quickly vanished. Did not appear to be other than a stationary object. What was it?
Iridium satellites are known for predictable flare events but are gradually being de-orbited and replaced. In particular, Iridium 66 would have flared at 6:04 several degrees east of Orion, but its orbit has almost certainly changed since its de-orbiting process started on August 2. Other Iridium satellites have taken 3 to 5 weeks to finish this process.
Other satellites can flare too if a shiny surface catches the Sun just right. Heavens-Above shows two satellites passing south of Orion at 6:12 on the morning of August 19: USA 215, an American spy satellite; and Cosmos 2084, a failed Russian early warning satellite.
Another possibility is a head-on sporadic meteor.
Update: Iridium 66 finished de-orbiting on August 23.